JP2017164311A - Deodorizing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently decompose a malodorous substance contained in a gas.SOLUTION: There is provided a deodorizing apparatus 1 which comprises a case 10 having an inlet port 11 and outlet port 12, a fan 21 or 22 for generating an air flow, a first tank 30 which is disposed in the case 10 and stores a first liquid 31, a hypochlorous acid generator 40 for generating a hypochlorous acid in the first liquid 31, a first filter 50 for bringing the first liquid 31 into contact with a gas taken-in from the inlet port 11, a second tank 60 which is disposed on the side of the outlet port 12 from the first tank 30 in the case 10 and stores a second liquid 61, a gas supply pump 70 for supplying a gas containing oxygen and nitrogen into the second liquid 61, a plasma generator 80 which generates a nitrogen oxide by generating plasma so as to contact with the second liquid 61 in the gas supplied by the gas supply pump 70, and a second filter 90 for bringing the second liquid 61 into contact with the gas passing through the first filter 50.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a deodorizing apparatus using hypochlorous acid.

  Conventionally, an apparatus for generating hypochlorous acid using electrolysis is known (see, for example, Patent Documents 1 and 2). Hypochlorous acid has a strong sterilizing power and can be used for decomposing odorous substances.

JP 2003-024941 A JP 2010-220852 A

  However, the gas includes substances that cannot be sufficiently decomposed by hypochlorous acid.

  Therefore, the present disclosure provides a deodorizing apparatus that efficiently decomposes malodorous substances contained in gas.

  In order to solve the above problem, a deodorizing apparatus according to one aspect of the present disclosure includes a housing having an air inlet and an air outlet, and gas is taken into the housing through the air inlet, or A fan that generates an air flow, a first tank that is disposed in the housing and stores the first liquid, and the second liquid is placed in the first liquid so that the gas is discharged out of the housing through the air outlet. A hypochlorous acid generator that generates chlorous acid, a first filter that is arranged so as to intersect the airflow, and that contacts the first liquid and the gas taken in from the air inlet; A second tank for storing the second liquid, a gas supply pump for supplying a gas containing oxygen and nitrogen into the second liquid, and a gas supply pump. In the supplied gas, the second liquid A plasma generator that generates nitrogen oxides by touching, and a second generator that is disposed so as to intersect the airflow and that contacts the second liquid and the gas that has passed through the first filter. 2 filters.

  According to the present disclosure, malodorous substances contained in gas can be efficiently decomposed.

It is a figure which shows the structure of the deodorizing apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the flow of the gas during operation | movement of the deodorizing apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the joint chlorine concentration when ammonia, nitric acid, and nitrous acid are added to hypochlorous acid in this order. It is a figure which shows the density | concentration of chloramine with respect to plasma processing time. It is a figure which shows the density | concentration of the ammonium ion in the pure water which passed the gas generated by bubbling the solution which reacted hypochlorous acid and ammonia with respect to bubbling time. It is a figure which shows the structure of the simple deodorizing apparatus used for decomposition | disassembly of hydrogen sulfide. It is a figure which shows the density | concentration of hydrogen sulfide with respect to the processing time of a plasma process or a hypochlorous acid process. It is a figure which shows the decomposition amount of methyl mercaptan with respect to the density | concentration of nitrous acid. It is a figure which shows the density | concentration of the methyl mercaptan with respect to the processing time of a plasma process or a hypochlorous acid process. It is a figure which shows the structure of the deodorizing apparatus which concerns on Embodiment 2. FIG. It is a figure which shows the structure of the deodorizing apparatus which concerns on Embodiment 3. FIG. It is a figure which shows the structure of the deodorizing apparatus which concerns on Embodiment 4. FIG.

(Outline of this disclosure)
In order to solve the above problem, a deodorizing apparatus according to one aspect of the present disclosure includes a housing having an air inlet and an air outlet, and gas is taken into the housing through the air inlet, or In the first liquid, a fan that generates an air flow, a first tank that is disposed in the casing and stores the first liquid, and that the gas is discharged out of the casing through the outlet. A hypochlorous acid generator that generates hypochlorous acid, a first filter that is disposed so as to intersect the air flow, and that contacts the first liquid and the gas taken in from the intake port; A second tank for storing the second liquid, a gas supply pump for supplying a gas containing oxygen and nitrogen into the second liquid, and the gas supply pump. In the gas supplied by the second liquid A plasma generator that generates nitrogen oxides by generating plasma so as to come into contact with the second liquid is disposed so as to intersect the air flow, and the second liquid and the gas that has passed through the first filter are brought into contact with each other. 2 filters.

Thereby, the gas containing ammonia (NH ₃ ) taken into the housing comes into contact with the first liquid by the first filter. Ammonia and hypochlorous acid (HClO) in the first liquid react with each other to produce chloramine (NH ₂ Cl). Further, the gas containing chloramine comes into contact with the second liquid by the second filter. Nitrous acid (HNO ₂ ) is generated by dissolving nitrogen oxide (NO _x ) generated by the plasma in the second liquid. Since chloramine is decomposed by nitrous acid, ammonia contained in the gas can be efficiently decomposed. In addition to ammonia, for example, hydrogen sulfide (H ₂ S) is decomposed by hypochlorous acid. In addition, methyl mercaptan (CH ₃ SH) is decomposed by hypochlorous acid and nitrous acid. Thus, according to the deodorizing apparatus according to one aspect of the present disclosure, malodorous substances such as ammonia, hydrogen sulfide, and methyl mercaptan contained in the gas can be efficiently decomposed.

  Further, for example, the deodorization apparatus may further include a gas-liquid contact member that promotes the dissolution of the nitrogen oxide into the second liquid by bringing the nitrogen oxide into contact with the second liquid. .

  Thereby, since the dissolution of nitrogen oxides into the second liquid is promoted, the concentration of nitrous acid in the second liquid can be increased. Therefore, the decomposition efficiency of malodorous substances can be increased.

  Further, nitrous acid in the second liquid is easily changed to nitric acid due to the temperature rise of the second liquid. For example, the deodorizing device may further include a cooling device that cools the second liquid.

  Thereby, since a cooling device can suppress the temperature rise of a 2nd liquid, it can suppress that nitrous acid in a 2nd liquid changes to nitric acid. Therefore, since the concentration of nitrous acid in the second liquid can be increased, the decomposition efficiency can be increased.

  For example, the gas supply pump may supply a part of the gas that has passed through the first filter.

  Thereby, ammonia, hydrogen sulfide, or methyl mercaptan contained in the gas can be directly decomposed by plasma, so that the decomposition efficiency can be increased.

  Hereinafter, embodiments will be specifically described with reference to the drawings.

  It should be noted that each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present disclosure. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  Each figure is a mimetic diagram and is not necessarily illustrated strictly. Therefore, for example, the scales and the like do not necessarily match in each drawing. Moreover, in each figure, the same code | symbol is attached | subjected about the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment 1)
[1. Overview]
First, the outline | summary of the deodorizing apparatus which concerns on Embodiment 1 is demonstrated. FIG. 1 is a diagram illustrating a configuration of a deodorizing apparatus 1 according to the present embodiment. FIG. 2 is a diagram illustrating a gas flow during operation of the deodorizing apparatus 1 according to the present embodiment.

  The deodorizing apparatus 1 decomposes malodorous substances contained in gas using hypochlorous acid and nitrous acid based on nitrogen oxides generated by plasma. The malodorous substance is a substance (odor substance) having an odor such as ammonia, hydrogen sulfide, or methyl mercaptan. In the present embodiment, the deodorizer 1 decomposes ammonia, hydrogen sulfide, and methyl mercaptan contained in the air.

  In addition, the deodorizing apparatus 1 may decompose not only malodorous substances but also other substances to be decomposed such as harmful substances and pollutants. Substances to be decomposed include, for example, chemical substances that are harmful to humans or ecosystems, fine particles such as pollen and house dust, or microorganisms.

  The deodorizing apparatus 1 is used for an air cleaner, for example. The deodorizing device 1 is disposed in a predetermined space such as a room and purifies the air in the space. Or the deodorizing apparatus 1 may be provided in the apparatus which preserve | saves or cooks foods, such as a refrigerator, a microwave oven, a fryer. Moreover, the deodorizing apparatus 1 may be provided in an air conditioner, a humidifier, a washing machine, a dishwasher, a vehicle, or the like.

[2. Constitution]
Next, the structure of the deodorizing apparatus 1 which concerns on this Embodiment is demonstrated.

  As shown in FIG. 1, the deodorizing apparatus 1 includes a housing 10, fans 21 and 22, a first tank 30, a hypochlorous acid generator 40, a first filter 50, a second tank 60, A gas supply pump 70, a plasma generator 80, and a second filter 90 are provided.

[2-1. Enclosure]
The housing 10 is a housing that forms an outline of the deodorizing apparatus 1. For example, the housing 10 is formed from a resin material such as plastic or a metal material. The outer shape of the housing 10 may be any shape such as a rectangular parallelepiped or a sphere. As shown in FIG. 1, the housing 10 has an intake port 11 and an air outlet 12.

  The air inlet 11 is an opening for taking gas into the housing 10 from the outside. The blower outlet 12 is an opening for discharging the gas taken into the housing 10 to the outside. As shown in FIG. 2, the gas 2 such as air containing a malodorous substance is taken into the housing 10 from the intake port 11, and after passing through the first filter 50 and the second filter 90 in this order, the air outlet 12. To the outside of the housing 10. The gas 6 discharged out of the housing 10 is purified by removing malodorous substances and the like.

  The air inlet 11 and the air outlet 12 are provided on the side surface of the housing 10 so as to face each other. Thereby, since the distance between the air inlet 11 and the blower outlet 12 can be lengthened, the space which provides the 1st filter 50 and the 2nd filter 90 between the air inlet 11 and the blower outlet 12 is ensured, In addition, gas can flow smoothly from the air inlet 11 to the air outlet 12.

  In addition, the position in which the inlet port 11 and the blower outlet 12 are provided is not restricted to the example shown in FIG. For example, each of the air inlet 11 and the air outlet 12 may be provided on the upper surface or the lower surface of the housing 10. The housing 10 may have a plurality of at least one of the air inlet 11 and the air outlet 12.

  The interior of the housing 10 is partitioned into a first space 13, a second space 14, and a third space 15 by a first filter 50 and a second filter 90. The first space 13 is a space including the air inlet 11 and is in contact with the first liquid 31 stored in the first tank 30. The second space 14 is a space sandwiched between the first filter 50 and the second filter 90 and is in contact with the first liquid 31 and the second liquid 61 stored in the second tank 60. The third space 15 is a space including the air outlet 12 and is in contact with the second liquid 61.

  The first space 13 and the second space 14 are separated by the inner wall of the housing 10, the first filter 50, the first liquid 31, and the first tank 30 so that gas does not go back and forth without passing through the first filter 50. ing. The second space 14 and the third space 15 are separated by the inner wall of the housing 10, the second filter 90, the second liquid 61, and the second tank 60 so that gas does not go back and forth without passing through the second filter 90. ing.

[2-2. fan]
The fan 21 generates an air flow so that gas is taken into the housing 10 through the air inlet 11. As shown in FIG. 1, the fan 21 is provided in the air inlet 11. Note that the fan 21 may be provided outside or inside the housing 10 (in the first space 13) instead of inside the air inlet 11.

  The fan 22 generates an air flow so that the gas is discharged out of the housing 10 through the air outlet 12. The fan 22 is provided in the blower outlet 12, as shown in FIG. Note that the fan 22 may be provided outside or inside the housing 10 (in the third space 15) instead of inside the air outlet 12.

  The fans 21 and 22 are driven by a control circuit (not shown). By operating the fans 21 and 22, the gas flows in the housing 10 in the direction from the air inlet 11 toward the air outlet 12, thereby generating an air flow. As the airflow passes through the first filter 50 and the second filter 90 in order, the gas forming the airflow comes into contact with the first liquid 31 and the second liquid 61. The malodorous substance contained in the gas is decomposed by hypochlorous acid contained in the first liquid 31 and nitrous acid contained in the second liquid 61.

  In addition, in this Embodiment, although the deodorizing apparatus 1 showed about the example provided with the two fans 21 and 22, the deodorizing apparatus 1 may be provided with only one or three or more fans. The arrangement of the fans is not limited to the example shown in FIG. 1 and may be arranged in the second space 14, for example.

[2-3. First tank]
The first tank 30 is a container for storing the first liquid 31 disposed in the housing 10. For example, the first tank 30 is a box having an open upper surface such as a tray, and is disposed on the bottom surface of the housing 10. In the present embodiment, the first tank 30 is disposed closer to the intake port 11 than the second tank 60.

The first liquid 31 is a liquid containing chlorine ions (Cl ⁻ ) such as tap water and saline. The first liquid 31 contains hypochlorous acid generated by the hypochlorous acid generator 40. The first liquid 31 is in contact with a part of the first filter 50.

  The first tank 30 is made of, for example, an acid-resistant resin material or metal material. For example, the first tank 30 is made of polyvinyl chloride, stainless steel, ceramic, or the like. In addition, when the 1st tank 30 is formed with a metal material, the process which prevents rust by plating, painting, etc. may be given.

[2-4. Hypochlorous acid generator]
The hypochlorous acid generator 40 is a device that generates hypochlorous acid in the first liquid 31. Specifically, the hypochlorous acid generator 40 has a pair of electrode pairs 41 and a power source (not shown) that applies a predetermined voltage to the electrode pairs 41, and electrolyzes the first liquid 31. As a result, hypochlorous acid is produced. The pair of electrodes 41 is, for example, a parallel plate electrode and is in contact with the first liquid 31.

  Hypochlorous acid decomposes ammonia to produce chloramine. Chloramine produced in the first liquid 31 volatilizes with time. As shown in FIG. 2, the gas 4 generated by the decomposition by hypochlorous acid, such as volatilized chloramine, rides on the airflow formed by the fans 21 and 22 and goes along with the gas 3 that has passed through the first filter 50. 2 flows toward the filter 90.

[2-5. First filter]
The 1st filter 50 is an example of the gas-liquid contact member arrange | positioned so that an airflow may be crossed. The first filter 50 brings the first liquid 31 and the gas 2 taken in from the intake port 11 into contact with each other. Specifically, the first filter 50 allows the gas 2 to pass therethrough and takes the substance contained in the gas 2 into the first liquid 31.

  For example, the first filter 50 is rotated by a roller or the like. Specifically, the first filter 50 is wound around two rollers arranged vertically with the lower part in contact with the first liquid 31. As the two rollers rotate, the first filter 50 rotates and contacts the first liquid 31 for each portion. Thereby, the first liquid 31 is spread over the entire first filter 50.

  The gas 2 is air, for example, and contains a malodorous substance such as hydrogen sulfide, ammonia, or methyl mercaptan. Further, the gas 2 includes chloramine (corresponding to the gas 4) volatilized from the first liquid 31 into the first space 13.

  The first filter 50 is arranged so that a part thereof is in contact with the first liquid 31 in the first tank 30. The first filter 50 has a shape and an arrangement such that no gap is formed between the first filter 50 and the inner surface of the housing 10 when viewed along the airflow direction. That is, the gas 2 does not substantially pass from the first space 13 to the second space 14 without passing through the first filter 50. Note that a frame member having a shape along the outer periphery of the first filter 50 may be provided to fill a gap between the first filter 50 and the inner surface of the housing 10.

  The first filter 50 is, for example, a member that increases the area of the first liquid 31 that contacts the gas 2. For example, the first filter 50 is a multi-area contact type porous member made of stainless steel or a chemical product. The multi-area contact type porous member is, for example, a porous plate in which a plurality of fine holes are formed. The average hole of the first filter 50 is, for example, several mm or less. For example, the average hole of the first filter 50 is simply equivalent to the average value of a plurality of holes appearing in an arbitrary cross section. The gas 2 is caught by these holes and easily comes into contact with the first liquid 31. The gas 2 captured by the first filter 50 comes into contact with hypochlorous acid contained in the first liquid 31. Thereby, ammonia, hydrogen sulfide, etc. contained in the gas 2 are decomposed, and a gas 4 such as chloramine is generated.

  Alternatively, the first filter 50 may be a cloth-like member having air permeability and water absorption. The first filter 50 may have a plurality of raised brushes in order to increase the surface area.

[2-6. Second tank]
The second tank 60 is a container for storing the second liquid 61 disposed in the housing 10. For example, the second tank 60 is a housing whose upper surface is opened like a tray, and is disposed on the bottom surface of the housing 10. In the present embodiment, the second tank 60 is disposed closer to the air outlet 12 than the first tank 30.

  The second liquid 61 is a liquid such as tap water or pure water. The second liquid 61 contains active species such as nitrogen oxides generated by the plasma generated by the plasma generator 80. The active species include, for example, hydroxyl radical (OH radical), hydrogen radical, oxygen radical, superoxide anion, monovalent oxygen ion, hydrogen peroxide and the like.

  Nitrogen oxide dissolves in the second liquid 61 as nitrous acid and nitric acid. Nitrous acid decomposes chloramine produced by decomposing ammonia, methyl mercaptan which is difficult to be decomposed by hypochlorous acid, and the like.

  In the present embodiment, a piping unit 62 is connected to the second tank 60. The piping part 62 is formed from tubular members, such as a pipe, a tube, or a hose, for example. Both ends of the piping part 62 are connected to the second tank 60, and the plasma generator 80 is disposed on the way. The piping unit 62 is provided with a liquid feeding device for sending the second liquid 61 such as a liquid pump (not shown).

  As a result, the second liquid 61 circulates between the second tank 60 and the plasma generator 80 via the piping part 62. That is, the piping part 62 forms a circulation path for the second liquid 61. In FIG. 2, the arrows shown along the piping part 62 indicate the direction in which the second liquid 61 flows. The plasma generator 80 can efficiently generate plasma by adjusting the diameter of the piping part 62, the flow rate of the second liquid 61, and the like. Further, the second liquid 61 circulates so that nitrogen oxide (nitrous acid) generated by the plasma can be diffused into the second liquid 61.

  The 2nd tank 60 and the piping part 62 are formed with an acid-resistant resin material or a metal material etc., for example. For example, the 2nd tank 60 and the piping part 62 are formed from a polyvinyl chloride, stainless steel, or a ceramic. When the 2nd tank 60 and the piping part 62 are formed with a metal material, the process which prevents rust may be given by plating or painting.

[2-7. Gas supply pump]
The gas supply pump 70 supplies a gas containing oxygen (O ₂ ) and nitrogen (N ₂ ). Specifically, the gas supply pump 70 takes in ambient air and supplies the taken air to the vicinity of the electrode pair 81 of the plasma generator 80.

  The gas supply pump 70 and the plasma generator 80 are connected by a gas supply pipe 71. The gas supply pipe 71 is a pipe for supplying gas from the gas supply pump 70 to the plasma generator 80. The gas supply pipe 71 is formed of, for example, a resin material or a metal material. The gas supply pipe 71 is formed from a tubular member such as a pipe, a tube, or a hose.

  As shown in FIG. 2, the gas supplied from the gas supply pump 70 diffuses as bubbles 72 in the second liquid 61. Since the plasma generator 80 generates plasma in the supplied gas, the bubbles 72 contain nitrogen oxides. When the bubbles 72 spread into the second liquid 61, nitrogen oxides contained in the bubbles 72 are dissolved in the second liquid 61, and nitrous acid and nitric acid are generated.

[2-8. Plasma generator]
The plasma generator 80 generates nitrogen oxides by generating plasma in contact with the second liquid 61 in the gas supplied by the gas supply pump 70. The plasma generator 80 is provided on the path of the piping part 62.

  The plasma generator 80 includes a pair of electrode pairs 81 and a power source (not shown) that applies a predetermined voltage to the pair of electrode pairs 81. The pair of electrodes 81 are arranged so as to be exposed in the piping part 62 with a predetermined interval. One of the pair of electrodes 81 is covered with the gas supplied by the gas supply pump 70.

  The power source applies a negative high-voltage pulse voltage between 2 to 50 kV / cm and 100 Hz to 20 kHz, for example, between the pair of electrodes 81. As a result, discharge is generated in the gas (bubble 72), and plasma is generated to generate nitrogen oxides.

[2-9. Second filter]
The 2nd filter 90 is an example of the gas-liquid contact member arrange | positioned so that an airflow may be crossed. The second filter 90 brings the second liquid 61 and the gas 5 that has passed through the first filter 50 into contact with each other. Specifically, the second filter 90 allows the gas 5 to pass therethrough and takes a substance contained in the gas 5 into the second liquid 61. For example, the second filter 90 is rotated by a roller or the like. The specific rotation mode is the same as that of the first filter 50. As a result, the second liquid 61 is spread over the entire second filter 90.

  Specifically, the gas 5 includes the gas 3 that has passed through the first filter 50 and the gas 4 such as chloramine that has been released from the first liquid 31 into the second space 14. Further, the gas 5 includes a gas released into the second space 14 among the gases (corresponding to the bubbles 72) supplied from the gas supply pump 70 into the second liquid 61.

  The second filter 90 may be arranged so that a part thereof is in contact with the second liquid 61 in the second tank 60. The second filter 90 has such a shape and arrangement that no gap is formed between the second filter 90 and the inner surface of the housing 10 when viewed along the airflow direction. That is, the gas 5 does not substantially pass from the second space 14 to the third space 15 without passing through the second filter 90. Note that a frame member having a shape along the outer periphery of the second filter 90 may be provided to fill a gap between the second filter 90 and the inner surface of the housing 10.

  The specific shape and arrangement of the second filter 90 are the same as those of the first filter 50. The gas 5 captured by the second filter 90 comes into contact with nitrous acid contained in the second liquid 61. By nitrous acid, chloramine, methyl mercaptan, etc. contained in the gas 5 are decomposed.

[3. Operation]
Then, operation | movement of the deodorizing apparatus 1 which has the said structure is demonstrated.

  The deodorizing device 1 starts the deodorizing operation when, for example, a power switch (not shown) is turned on. Specifically, a control circuit (not shown) of the deodorizing apparatus 1 drives the fans 21 and 22 and starts applying a voltage to the electrode pairs 41 and 81 of the hypochlorous acid generator 40 and the plasma generator 80. To do.

The gas 2 taken into the housing 10 (in the first space 13) through the air inlet 11 contains ammonia, hydrogen sulfide, and methyl mercaptan as malodorous substances. As shown in FIG. 2, the gas 2 comes into contact with the first liquid 31 by the first filter 50. Since the first liquid 31 contains hypochlorous acid, ammonia and hypochlorous acid react to produce chloramine. In addition, hydrogen sulfide and hypochlorous acid react to generate sulfuric acid (H ₂ SO ₄ ). Methyl mercaptan and hypochlorous acid do not react very much.

  The gas 3 containing methyl mercaptan which does not react with hypochlorous acid and the gas 5 containing gas 4 such as chloramine which has been generated and volatilized by reaction with hypochlorous acid are supplied to the second liquid 61 by the second filter 90. Contact with. Since the second liquid 61 contains nitrous acid, chloramine and methyl mercaptan are decomposed.

  As a result, the gas 6 that has been purified by removing the malodorous substance is discharged from the outlet 12 to the outside of the housing 10.

  Below, the detail of reaction with each substance and hypochlorous acid or nitrous acid is demonstrated based on an experimental result.

[3-1. Decomposition of ammonia with hypochlorous acid]
The deodorizing apparatus 1 decomposes and removes ammonia in two stages with hypochlorous acid and nitrous acid. First, the experimental result which confirmed that ammonia was decomposed | disassembled using a chemical | medical agent is demonstrated using FIG. Specifically, ammonia, nitric acid, and nitrous acid were sequentially added to hypochlorous acid.

  FIG. 3 is a diagram showing the combined chlorine concentration when ammonia, nitric acid, and nitrous acid are added to hypochlorous acid in this order. Specifically, FIG. 3 shows, in order from the left, only hypochlorous acid, solution A obtained by adding ammonia to hypochlorous acid, solution B obtained by adding nitric acid to solution A, and solution obtained by adding nitrous acid to solution B The bound chlorine concentration for each of C is shown. The bound chlorine concentration is the concentration of bound residual chlorine (specifically, chloramine) contained in the solution.

  As shown in “Solution A” in FIG. 3, it can be seen that chloramine is produced by adding ammonia to hypochlorous acid. Therefore, in this Embodiment, since the 1st liquid 31 contains the hypochlorous acid produced | generated by the hypochlorous acid generator 40, it reacts with hypochlorous acid and ammonia contained in the gas 2. Chloramine is produced.

  As shown in “Solution B”, even when nitric acid is added to Solution A containing chloramine, the concentration of chloramine hardly changes. On the other hand, as shown in “Solution C”, it can be seen that the concentration of chloramine is reduced when nitrous acid is added. That is, nitrous acid decomposes chloramine under acidic conditions. In the present embodiment, since the nitrogen oxide generated by the plasma generator 80 is dissolved in the second liquid 61, nitric acid and nitrous acid are generated. Therefore, the second liquid 61 is acidic, and nitrous acid is added. A solution containing. Therefore, the second liquid 61 can decompose chloramine.

  Here, the degradation of chloramine was confirmed by adding a chemical, but even when plasma-treated water was added instead of nitric acid and nitrous acid, a decrease in the concentration of chloramine was confirmed. Plasma treated water is a liquid after plasma is generated in advance for a predetermined period.

[3-2. Degradation of chloramine]
FIG. 4 is a diagram showing the concentration of chloramine with respect to the plasma treatment time. In FIG. 4, the horizontal axis represents the processing time (ie, discharge period (voltage application period)) in which the plasma treatment was performed, and the vertical axis represents the chloramine concentration.

  As shown in FIG. 4, the concentration of chloramine is reduced by generating plasma. It should be noted that the concentration of chloramine is lowered even when plasma is not generated. The decrease in concentration when no plasma is generated is based on volatilization of chloramine. It can be seen that when plasma is generated, the concentration of chloramine is sufficiently reduced compared to when plasma is not generated.

Specifically, it is estimated that chloramine was decomposed and ammonium nitrate (NH ₄ NO ₃ ) was generated by the reaction of chloramine and nitrous acid. Ammonium nitrate exists as an ammonium ion (NH ₄ ⁺ ) and a nitrate ion (NO ₃ ⁻ ) in an acidic liquid.

[3-3. Ammonia volatilization]
In the present embodiment, since chloramine and nitrous acid react in the second liquid 61, ammonium ions exist in the second liquid 61. For example, in an alkaline solution, ammonium ions react with hydroxide ions and volatilize as ammonia.

  Here, the experimental results confirming that ammonium ions are confined in the second liquid 61 after the plasma treatment (that is, the amount of volatilization of ammonia is small) will be described with reference to FIG. Specifically, after hypochlorous acid and ammonia were reacted, the gas (volatilized gas) discharged by the bubbling process was passed through pure water, and the concentration of ammonium ions in the pure water was measured. The measurement results are shown in FIG. In addition, FIG. 5 is a figure which shows the density | concentration of the ammonium ion in the pure water which passed the gas generated by bubbling the solution which reacted hypochlorous acid and ammonia with respect to bubbling time.

  In FIG. 5, the horizontal axis represents the time for bubbling, and the vertical axis represents the concentration of ammonium ions in the pure water through which the exhausted gas has passed. Specifically, the vertical axis corresponds to the concentration of gas volatilized after reacting hypochlorous acid and ammonia.

  Chloramine is produced by the reaction of ammonia and hypochlorous acid. By bubbling the solution containing the produced chloramine, the dissolved ammonium ions are volatilized as ammonia. By passing the volatilized ammonia through the pure water, the ammonia is dissolved in the pure water.

  When plasma is not generated, the longer the bubbling time, the higher the ammonium ion concentration. That is, it means that the amount of ammonia volatilized is large.

  On the other hand, when plasma is generated, nitrous acid generated by the plasma decomposes chloramine. For this reason, the solution contains ammonium ions generated by the decomposition of chloramine. By bubbling the solution, ammonia is volatilized, and the ammonia is dissolved in pure water by passing the volatilized ammonia through the pure water.

  For this reason, ammonium ions are detected even when plasma is generated. However, as shown in FIG. 5, an increase in the concentration of ammonium ions is suppressed. That is, the volatilization amount of ammonia with respect to the bubbling time is suppressed. This is because not only nitrous acid but also nitric acid is generated by the plasma, and the solution becomes acidic.

  According to the deodorizing apparatus 1 according to the present embodiment, since the second liquid 61 becomes acidic and ammonium ions are confined in the second liquid 61, it is possible to suppress ammonia from volatilizing. Therefore, it is possible to suppress the discharge of ammonia from the outlet 12.

[3-4. Decomposition of hydrogen sulfide]
Next, the decomposition of hydrogen sulfide will be described. Here, hydrogen sulfide was decomposed by using a simple deodorizing apparatus simulating the deodorizing apparatus 1. FIG. 6 is a diagram showing a configuration of a simple deodorizing apparatus 1x used for decomposition of hydrogen sulfide.

  As shown in FIG. 6, the simple deodorizing apparatus 1x includes a container 10x having a first air inlet 11x, a second air inlet 71x, and an air outlet 12x, and a pair disposed in the vicinity of the second air inlet 71x in the container 10x. Electrode pair 81x. A predetermined liquid 61x is stored in the container 10x.

  The container 10x corresponds to the housing 10, the first tank 30, the second tank 60, and the like. The first air inlet 11x, the second air inlet 71x, and the air outlet 12x correspond to the air inlet 11, the gas supply pipe 71, and the air outlet 12, respectively. The pair of electrode pairs 81x corresponds to the pair of electrode pairs 81 (or 41) included in the plasma generator 80 or the hypochlorous acid generator 40.

  The gas 2x introduced into the first intake port 11x corresponds to the gas 2 taken in through the intake port 11. The gas 7 x introduced into the second intake port 71 x corresponds to the gas supplied to the vicinity of the electrode pair 81 of the plasma generator 80 by the gas supply pump 70. The gas 6x discharged from the blower outlet 12x corresponds to the gas 6 discharged from the blower outlet 12. In the simple deodorizing apparatus 1x shown in FIG. 6, the total flow rate of the gases 2x and 7x introduced into the container 10x is substantially the same as the flow rate of the gas 7x discharged from the container 10x.

  When plasma or hypochlorous acid is generated while continuously flowing a gas 2x containing hydrogen sulfide from the first intake port 11x at a predetermined flow rate, hydrogen sulfide contained in the gas 6x discharged from the outlet 12x Concentration was measured. The measurement results are shown in FIG. From the first air inlet 11x, the gas 2x containing hydrogen sulfide is 0.8 L / min, and from the second air inlet 71x, the gas 7x which is air not containing hydrogen sulfide is 0.2 L / min. Introduced within 10x.

  FIG. 7 is a diagram showing the concentration of hydrogen sulfide with respect to the treatment time of plasma treatment or hypochlorous acid treatment. In FIG. 7, the horizontal axis represents the processing time for performing plasma processing or the processing time for generating hypochlorous acid. In FIG. 7, a period between 10 minutes and 40 minutes is a period in which voltage is applied, and a period in which hypochlorous acid is generated or a period in which plasma is generated.

The “plasma gas-liquid” indicated by the thick solid line in FIG. 7 indicates the concentration of hydrogen sulfide contained in the gas 6x discharged from the outlet 12x when plasma is generated in the gas introduced in the vicinity of the electrode pair 81x. Is shown. “Hypochlorous acid” indicated by a broken line indicates the concentration of hydrogen sulfide contained in the gas 6x discharged from the outlet 12x when hypochlorous acid is generated by electrolysis between the electrode pair 81x. . Note that “plasma (H ₂ S introduction: 0.2 L / min)” indicated by a dotted line and “plasma (H ₂ S introduction: 1 L / min)” indicated by a thin solid line will be described in detail in the description of the fourth embodiment. .

  As shown in FIG. 7, it can be seen that when plasma is generated, the concentration of hydrogen sulfide is reduced by about 0.5 ppm, but is not decomposed much. On the other hand, when hypochlorous acid is produced, the concentration of hydrogen sulfide is reduced by about 3 ppm, indicating that hydrogen sulfide is sufficiently decomposed. In addition, since the produced | generated hypochlorous acid remains in the liquid 61x even after the application of the voltage after 40 minutes is complete | finished, decomposition | disassembly of hydrogen sulfide is performed continuously.

  As described above, it was difficult to sufficiently decompose hydrogen sulfide only with plasma, but it was confirmed that hydrogen sulfide was decomposed by using hypochlorous acid.

[3-5. Decomposition of methyl mercaptan]
Next, the decomposition of methyl mercaptan will be described. First, it was confirmed that methyl mercaptan was decomposed by nitrous acid by adding a nitrous acid reagent having a predetermined concentration to methyl mercaptan. The confirmation result is shown in FIG.

  FIG. 8 is a graph showing the decomposition amount of methyl mercaptan with respect to the concentration of nitrous acid. In FIG. 8, the horizontal axis represents the concentration of nitrous acid, and the vertical axis represents the decomposition amount of methyl mercaptan.

  As shown in FIG. 8, the higher the concentration of nitrous acid, the larger the amount of methyl mercaptan decomposed. Therefore, it is assumed that nitrous acid generated by plasma can decompose methyl mercaptan.

  Below, methyl mercaptan was decomposed | disassembled using the simple deodorizing apparatus 1x shown in FIG. 6 similarly to the case of hydrogen sulfide.

  Specifically, when plasma or hypochlorous acid is generated while continuously flowing a gas 2x containing methyl mercaptan from the first intake port 11x at a predetermined flow rate, the gas 6x discharged from the outlet 12x The concentration of methyl mercaptan contained was measured. The measurement results are shown in FIG. From the first intake port 11x, the gas 2x containing methyl mercaptan is 0.8 L / min, and from the second intake port 71x, the gas 7x which is air not containing methyl mercaptan is 0.2 L / min. Introduced within 10x.

  FIG. 9 is a diagram showing the concentration of methyl mercaptan with respect to the treatment time of plasma treatment or hypochlorous acid treatment. In FIG. 9, the horizontal axis represents the processing time for performing plasma processing or the processing time for generating hypochlorous acid. In FIG. 7, a period between 10 minutes and 40 minutes is a period in which voltage is applied, and a period in which hypochlorous acid is generated or a period in which plasma is generated.

The “plasma gas-liquid” indicated by the thick solid line in FIG. 9 indicates the concentration of methyl mercaptan contained in the gas 6x discharged from the outlet 12x when plasma is generated in the gas introduced in the vicinity of the electrode pair 81x. Is shown. “Hypochlorous acid” indicated by a broken line indicates the concentration of methyl mercaptan contained in the gas 6x discharged from the air outlet 12x when hypochlorous acid is generated by electrolysis between the electrode pair 81x. . Note that “plasma (CH ₃ SH introduction: 0.2 L / min)” indicated by a thin solid line and “plasma (CH ₃ SH introduction: 1 L / min)” indicated by a dotted line will be described in detail in the description of the fourth embodiment. .

  As shown in FIG. 9, when plasma is generated and when hypochlorous acid is generated, the concentration of methyl mercaptan is reduced by about 1.5 ppm, and it can be seen that methyl mercaptan is decomposed. In the case of hypochlorous acid, since the generated hypochlorous acid remains in the liquid 61x even after the application of the voltage for 40 minutes and thereafter is finished, the decomposition of methyl mercaptan is continuously performed. ing.

[4. Summary]
As described above, the deodorizing apparatus 1 according to the present embodiment is configured so that the casing 10 having the inlet 11 and the outlet 12 and the gas 2 is taken into the casing 10 through the inlet 11. Alternatively, the fans 21 and 22 that generate the airflow and the first liquid 31 that is disposed in the housing 10 and stores the first liquid 31 so that the gas 6 is discharged out of the housing 10 through the air outlet 12. A tank 30, a hypochlorous acid generator 40 that generates hypochlorous acid in the first liquid 31, a gas 2 that is disposed so as to intersect the airflow, and is taken in from the first liquid 31 and the intake port 11, A first filter 50 in contact with the second tank 60, a second tank 60 disposed on the outlet 12 side of the first tank 30 in the housing 10, and a second tank 60 for storing the second liquid 61, and a second gas containing oxygen and nitrogen. A gas supply pump 70 for supplying the liquid 61 and a gas supply pump 7 The plasma is generated so as to come into contact with the second liquid 61 in the gas supplied by the plasma generator 80 to generate nitrogen oxides, and the second liquid 61 A second filter 90 that contacts the gas that has passed through the first filter 50.

  Thus, the deodorizing apparatus 1 decomposes the malodorous substance contained in the gas taken in from the intake port 11 in two stages. Specifically, in the first stage, the incorporated malodorous substance is reacted with hypochlorous acid. In the second stage, a substance generated by reaction with hypochlorous acid and a substance that does not react with hypochlorous acid are reacted with nitrous acid generated by plasma.

  Thereby, as demonstrated using FIGS. 3-9, malodorous substances, such as ammonia, hydrogen sulfide, and methyl mercaptan, can be decompose | disassembled efficiently.

(Embodiment 2)
Subsequently, a deodorizing apparatus according to Embodiment 2 will be described.

[1. Constitution]
FIG. 10 is a diagram illustrating a configuration of the deodorizing apparatus 100 according to the present embodiment. As shown in FIG. 10, the deodorizing apparatus 100 is different from the deodorizing apparatus 1 according to Embodiment 1 shown in FIG. 1 in that a gas-liquid contact member 110 is newly provided.

  The gas-liquid contact member 110 promotes the dissolution of nitrogen oxides into the second liquid 61 by bringing the nitrogen oxides into contact with the second liquid 61. As shown in FIG. 10, the gas-liquid contact member 110 is provided on the downstream side of the plasma generator 80 in the piping portion 62. That is, the gas-liquid contact member 110 is disposed between the plasma generator 80 and the second tank 60 so that the second liquid 61 that has passed through the plasma generator 80 passes on the way back to the second tank 60. Yes. Similar to the case shown in FIG. 2, it is assumed that the second liquid 61 is circulated in the pipe portion 62 and the second tank 60 counterclockwise in FIG. 10.

  The gas-liquid contact member 110 passes the second liquid 61 after the plasma is generated by the plasma generator 80, and dissolves the nitrogen oxide generated by the plasma into the second liquid 61. Specifically, the gas-liquid contact member 110 is a member that increases the contact area or contact time between the nitrogen oxide and the second liquid 61.

  For example, the gas-liquid contact member 110 is a long hollow tube such as a tube, a hose, or a pipe. Specifically, the gas-liquid contact member 110 is a hose wound in a roll shape. Since the second liquid 61 passes through the gas-liquid contact member 110, the time until the second liquid 61 returns from the plasma generator 80 to the second tank 60 can be lengthened. That is, since the contact time between the nitrogen oxide generated by the plasma and the second liquid 61 becomes long, the dissolution of the nitrogen oxide into the second liquid 61 is promoted.

  In the gas-liquid contact member 110, for example, the ratio of the tube length to the inner diameter of the tube is, for example, 50 or more. Thereby, a contact time can be increased and sufficient quantity of nitrous acid can be produced | generated.

  The gas-liquid contact member 110 may be a filter for increasing the contact area between the nitrogen oxide and the second liquid 61. For example, the gas-liquid contact member 110 may be a porous film. When the second liquid 61 passes through the porous membrane, the nitrogen oxide gas becomes finer, and the contact area with the second liquid 61 can be increased.

  The gas-liquid contact member 110 is formed from, for example, an acid-resistant resin material or metal material. For example, the gas-liquid contact member 110 is made of polyvinyl chloride, stainless steel, ceramic, or the like.

[2. Summary]
As described above, the deodorizing apparatus 100 according to the present embodiment further brings the nitrogen oxide and the second liquid 61 into contact with each other, thereby promoting the gas-liquid contact that promotes the dissolution of the nitrogen oxide into the second liquid 61. A member 110 is provided.

  Thereby, since the penetration of nitrogen oxides into the second liquid 61 is promoted, the concentration of nitrous acid in the second liquid 61 can be increased. Therefore, chloramine produced by reaction of ammonia with hypochlorous acid, methyl mercaptan remaining without being decomposed by hypochlorous acid, and the like can be efficiently decomposed.

(Embodiment 3)
Subsequently, a deodorizing apparatus according to Embodiment 3 will be described.

[1. Constitution]
FIG. 11 is a diagram illustrating a configuration of a deodorizing apparatus 200 according to the present embodiment. As shown in FIG. 11, the deodorizing apparatus 200 is different from the deodorizing apparatus 100 according to Embodiment 2 shown in FIG. 10 in that a cooling device 220 is newly provided.

  The cooling device 220 cools the second liquid 61. Specifically, the cooling device 220 cools the gas-liquid contact member 110 to cool the second liquid 61 that passes through the gas-liquid contact member 110. The cooling device 220 cools the second liquid 61 to a temperature of 5 ° C. to 20 ° C., for example. As an example, the cooling device 220 maintains the second liquid 61 at a temperature of 10 ° C. The cooling device 220 may be either air-cooled or water-cooled.

  The nitrous acid dissolved in the second liquid 61 changes to nitric acid when the temperature of the second liquid 61 increases. The cooling device 220 can suppress the change of nitrous acid to nitric acid by keeping the temperature of the second liquid 61 low.

  In the example illustrated in FIG. 11, the cooling device 220 cools the gas-liquid contact member 110, but is not limited thereto. The cooling device 220 may cool the plasma generator 80. Alternatively, the cooling device 220 may cool part or all of the piping unit 62 or the second tank 60.

[2. Summary]
As described above, the deodorizing apparatus 200 according to the present embodiment further includes the cooling device 220 that cools the second liquid 61.

  Thereby, since the cooling device 220 can suppress the temperature rise of the 2nd liquid 61, it can suppress that the nitrous acid in the 2nd liquid 61 changes to nitric acid. Accordingly, since the decrease in the concentration of nitrous acid in the second liquid 61 is suppressed, chloramine produced by the reaction of ammonia with hypochlorous acid and methyl remaining without being decomposed by hypochlorous acid. Mercaptan can be decomposed efficiently.

(Embodiment 4)
Subsequently, a deodorizing apparatus according to Embodiment 4 will be described.

[1. Constitution]
FIG. 12 is a diagram illustrating a configuration of a deodorizing apparatus 300 according to the present embodiment. As shown in FIG. 12, the deodorizing apparatus 300 differs from the deodorizing apparatus 200 according to Embodiment 2 shown in FIG. 11 in the arrangement of the gas supply pump 70.

  Specifically, the gas supply pump 70 is disposed not inside the housing 10 but inside the housing 10. More specifically, the gas supply pump 70 is disposed in the second space 14 between the first filter 50 and the second filter 90.

  In the present embodiment, the gas supply pump 70 supplies a part of the gas 3 that has passed through the first filter 50. Specifically, the gas supply pump 70 supplies, to the plasma generator 80, the gas 3 that has passed through the first filter 50 and the gas 4 that contains chloramine volatilized from the first liquid 31, and the electrode pair 81 of the plasma generator 80. Supply in the vicinity of That is, the gas supply pump 70 takes in the gas in the second space 14 (specifically, the gas before passing through the first filter 50 and before passing through the second filter 90), and the taken-in gas is used as an electrode pair. It supplies to the vicinity of 81.

  Hydrogen sulfide, methyl mercaptan, and the like contained in the gas supplied in the vicinity of the electrode pair 81 are directly decomposed by plasma generated in the vicinity of the electrode pair 81. Hereinafter, the decomposition of hydrogen sulfide and methyl mercaptan by plasma will be described with reference to FIGS. 6, 7, and 9.

[2-1. Hydrogen sulfide plasma decomposition]
Here, hydrogen sulfide was decomposed using the simple deodorizing apparatus 1x shown in FIG. Specifically, plasma was generated while hydrogen sulfide was allowed to flow continuously from the second air intake port 71x at a predetermined flow rate instead of the first air intake port 11x instead of the first air intake port 11x.

“Plasma (H ₂ S introduction: 0.2 L / min)” indicated by a dotted line in FIG. 7 introduces the gas 2x containing hydrogen sulfide from the second intake port 71 x at 0.2 L / min and the first intake air. It shows the concentration of hydrogen sulfide contained in the gas 6x discharged from the outlet 12x when plasma is generated while introducing the gas 7x containing hydrogen sulfide at 0.8 L / min from the port 11x. “Plasma (H ₂ S introduction: 1 L / min)” shown by a thin solid line in FIG. 7 is when plasma is generated while introducing a gas 7 x containing hydrogen sulfide at 1 L / min only from the second air inlet 71 x. 5 shows the concentration of hydrogen sulfide contained in the gas 6x discharged from the outlet 12x.

  As shown in FIG. 7, it can be seen that the concentration of hydrogen sulfide greatly decreases as the amount of hydrogen sulfide introduced from the second intake port 71x increases. Also, immediately after the application of voltage is stopped in about 40 minutes, the concentration of hydrogen sulfide increases rapidly. That is, since the concentration increases immediately after the generation of plasma is stopped, it is assumed that the generated plasma decomposes hydrogen sulfide during the generation of plasma.

  Thus, hydrogen sulfide can be decomposed more efficiently by supplying hydrogen sulfide in the vicinity of the electrode pair 81x where plasma is generated. In the present embodiment, since the gas supply pump 70 supplies the gas 3 containing hydrogen sulfide and the like that could not be decomposed by hypochlorous acid to the vicinity of the electrode pair 81 of the plasma generator 80, the decomposition of hydrogen sulfide is performed. Efficiency can be increased.

[2-2. Decomposition of methyl mercaptan by plasma]
As in the case of hydrogen sulfide, methyl mercaptan was decomposed using the simple deodorizing apparatus 1x shown in FIG. Specifically, plasma was generated while methyl mercaptan was continuously supplied from the second intake port 71x at a predetermined flow rate instead of the first intake port 11x instead of the first intake port 11x.

“Plasma (CH ₃ SH introduction: 0.2 L / min)” indicated by a dotted line in FIG. 9 introduces a gas 2x containing methyl mercaptan from the second intake port 71 x at 0.2 L / min and the first intake air. The figure shows the concentration of methyl mercaptan contained in the gas 6x discharged from the outlet 12x when plasma is generated while introducing the gas 7x containing methyl mercaptan at 0.8 L / min from the mouth 11x. “Plasma (CH ₃ SH introduction: 1 L / min)” indicated by a thin solid line in FIG. 9 is generated when plasma is generated while introducing a gas 7x containing methyl mercaptan at 1 L / min only from the second intake port 71x. 3 shows the concentration of methyl mercaptan contained in the gas 6x discharged from the air outlet 12x.

  As shown in FIG. 9, it can be seen that the concentration of methyl mercaptan greatly decreases as the amount of methyl mercaptan introduced from the second air inlet 71x increases. Further, as in the case of hydrogen sulfide, the concentration of methyl mercaptan increases rapidly immediately after the application of voltage is stopped in about 40 minutes. That is, since the concentration increases immediately after the generation of plasma is stopped, it is assumed that the generated plasma decomposes methyl mercaptan during the generation of plasma.

  Thus, by supplying methyl mercaptan in the vicinity of the electrode pair 81x where plasma is generated, methyl mercaptan can be decomposed more efficiently. In the present embodiment, the gas supply pump 70 supplies the gas 3 containing methyl mercaptan and the like that could not be decomposed by hypochlorous acid to the vicinity of the electrode pair 81 of the plasma generator 80. Efficiency can be increased.

[3. Summary]
As described above, in the deodorizing apparatus 300 according to the present embodiment, the gas supply pump 70 supplies part of the gas 3 that has passed through the first filter 50.

  Thereby, hydrogen sulfide and methyl mercaptan contained in the gas 3 can be directly decomposed by plasma. Therefore, the decomposition efficiency of malodorous substances can be further increased.

(Other embodiments)
Although the deodorizing apparatus according to one or more aspects has been described based on the embodiments, the present disclosure is not limited to these embodiments. Unless it deviates from the main point of this indication, the form which carried out various deformation | transformation which those skilled in the art thought to this embodiment, and the structure constructed | assembled combining the component in different embodiment is also included in the scope of this indication. It is.

  For example, in each of the above-described embodiments, the first filter 50 is rotated by a roller or the like as a method for spreading the first liquid 31 to the first filter 50, but is not limited thereto. For example, the first filter 50 may be a plate-like member whose lateral width substantially matches the inner surface of the housing 10. The first filter 50 is disposed such that the upper part and the side part are in contact with the inner surface of the upper part of the housing 10 and the inner surface of the side part, respectively. The lower part of the first filter 50 is immersed in the first liquid 31.

  In this case, for example, the first liquid 31 in the first tank 30 may be sprayed on the first filter 50 by a sprayer or the like. Alternatively, the first liquid 31 may be sucked up from the first tank 30 and flowed from the upper part of the first filter 50 by a pipe and a liquid pump.

  Further, for example, in each of the above-described embodiments, the example in which the plasma generator 80 is provided on the path of the piping unit 62 connected to the second tank 60 has been described, but the present invention is not limited thereto. For example, the plasma generator 80 may be arranged such that the pair of electrodes 81 is located in the second tank 60.

  Further, for example, in each of the above-described embodiments, an example in which the hypochlorous acid generator 40 generates hypochlorous acid by electrolysis has been described, but the present invention is not limited thereto. For example, the hypochlorous acid generator 40 may generate hypochlorous acid in the first liquid 31 by adding a predetermined amount of hypochlorous acid chemical.

  Each of the above-described embodiments can be variously changed, replaced, added, omitted, etc. within the scope of the claims or an equivalent scope thereof.

  The present disclosure can be used as a deodorizing device that can efficiently decompose malodorous substances contained in a gas, and can be used, for example, in an air purifier.

1, 100, 200, 300 Deodorizing device 1x Simple deodorizing device 2, 2x, 3, 4, 5, 6, 6x, 7x Gas 10 Housing 10x Container 11 Intake port 11x First intake port 12, 12x Outlet 13 First Space 14 Second space 15 Third space 21, 22 Fan 30 First tank 31 First liquid 40 Hypochlorous acid generator 41, 81, 81x Electrode pair 50 First filter 60 Second tank 61 Second liquid 61x Liquid 62 Piping section 70 Gas supply pump 71 Gas supply pipe 71x Second air inlet 72 Bubble 80 Plasma generator 90 Second filter 110 Gas-liquid contact member 220 Cooling device

Claims (4)

A housing having an air inlet and an air outlet;
A fan that generates an air flow so that gas is taken into the casing through the intake port or gas is discharged out of the casing through the outlet;
A first tank disposed in the housing for storing a first liquid;
A hypochlorous acid generator for generating hypochlorous acid in the first liquid;
A first filter disposed so as to intersect with the airflow, and contacting the first liquid and the gas taken in from the air inlet;
A second tank disposed on the outlet side of the first tank in the housing and for storing a second liquid;
A gas supply pump for supplying a gas containing oxygen and nitrogen into the second liquid;
A plasma generator that generates nitrogen oxides by generating a plasma in contact with the second liquid in the gas supplied by the gas supply pump;
A deodorizing apparatus, comprising: a second filter that is disposed so as to intersect the airflow and that contacts the second liquid and the gas that has passed through the first filter. further,
The deodorizing apparatus according to claim 1, further comprising a gas-liquid contact member that promotes dissolution of the nitrogen oxide into the second liquid by bringing the nitrogen oxide into contact with the second liquid. further,
The deodorizing apparatus according to claim 1, further comprising a cooling device that cools the second liquid. The deodorizing apparatus according to any one of claims 1 to 3, wherein the gas supply pump supplies part of the gas that has passed through the first filter.

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